CSEMP assessment of CB138 in sediment at inner (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 144.14 | 145.43 | -69.07 | 138.14 | |||
linear | 2 | 145.59 | 148.06 | -68.80 | 137.59 | 0.545 | 1 | 0.4605 |
smooth (df = 2) | 3 | 146.58 | 150.74 | -68.29 | 136.58 | 1.019 | 1 | 0.3127 |
smooth (df = 3) | 4 | 146.91 | 153.46 | -67.46 | 134.91 | 1.660 | 1 | 0.1976 |
smooth (df = 4) | 5 | 146.07 | 155.87 | -66.04 | 132.07 | 2.843 | 1 | 0.0918 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2018 | 0.4075 | 0.6152 | 0.20764 | 0.27829 | 0.746 | 0.4671 |
last 20 years | 1999 | 2018 | 0.4075 | 0.6152 | 0.20764 | 0.27829 | 0.746 | 0.4671 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 1.85 | 0.15 | -2.5123 | 0.1501 | -16.735 | 1.0000 |
EAC | 1.85 | 7.90 | 1.4517 | 0.1501 | 9.670 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for chlorobiphenyls in sediment
- Accessment criteria for chlorobiphenyls in sediment
Media : Sediment (unsieved)
Station : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : CB138
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : CB138
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020